Water Heater Installation Manual
7 Page
INSTALLATION
GENERAL
1. Follow all local codes, or in the absence of local codes, follow the current edition of the National Fuel Gas
Code: ANSI Z223.1/NFPA 54.
2. All gas water heaters require careful and correct installation to ensure safe and efficient operation. This
manual must be followed exactly. Read the "Safety Guidelines" Section.
3. The manifold gas pressure is preset at the factory. It is computer controlled and should not need
adjustment.
4. Maintain proper space for servicing. Install the unit so that it can be connected or removed easily. Refer
to the "Clearances" Section on page 9 for proper clearances.
5. The water heater must be installed in a location where the proper amount of combustion air will be
available to it at all times without obstructions, or the indoor heater must be direct vented. See pages 13
to 29.
6. Install the water heater so it is level (left-to-right & front-to-back) and plumb (vertically).
7. Electrical service to the water heater requires a means of disconnection. This will allow power to the
water heater to be shut off for servicing and safety purposes.
8. Do not install the unit where the exhaust vent is pointing into any opening in a building or where the
noise may disturb your neighbors. Make sure the vent termination meets the required clearance from
any doorway or opening to prevent exhaust from entering a building. (Refer to pages 8, 11, 14 and 15.)
Check local code requirements prior to installation.
9. Carefully plan the installation location of the heater and vent terminations. Contaminants such as
aerosols, lint, and fine powders (including flour) can clog the air intake and reduce the operation of the
fan. This, in turn, can cause improper combustion and reduce the life of the water heater. Regularly
ensure that the area around the water heater, vent termination, and air intake are free of dust, debris,
and other contaminants. In environments with a high level of contaminants (laundry facilities, hair salons,
pet salons, chemical plants, commercial kitchens, etc.), direct venting is required.
10. The Indoor models are to be installed indoors only. These units are equipped with a thermistor and
hi-limit switch for the exhaust gas, detecting excess temperatures within the flue and enabling the unit
to safely stop operations if needed. These components are always monitoring exhaust gas conditions in
order to prevent heat damage to ABS, PVC, CPVC, or polypropylene (Plastic) venting if ABS, PVC, CPVC,
or polypropylene is used. If the exhaust gas temperature exceeds 140 °F (60 °C), these components will
enable the unit to safely stop operations. These components are not installed on the outdoor models
since the exhaust vent is built-in.
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supply pipe. The intake pipe must be sealed airtight. Refer to pages 13 to 29 for more detail.
• Terminating the venting through a sidewall is recommended for the direct-vent system.
• Running the exhaust vent and the intake pipe parallel is recommended.
• Terminating the exhaust and intake on the same wall/surface is recommended. Terminating in the
same pressure zone allows for pressure balancing, which prevents nuisance shutdowns.
• Only install the water heater in a heated area where below freezing temperatures cannot occur.
The warranty does not cover damage caused by freezing.
• The water heater must be securely mounted to a wall or other suitable structure.
• The venting system shall be installed in accordance with the water heater manufacturer's and
venting system manufacturer's instructions.
11. The Outdoor models must only be installed outdoors and only in an area with mild, temperate climates.
The Outdoor model shall be wall-mounted or mounted on a stand. Locate the Outdoor model in an open,
unroofed area and maintain the following minimum clearances: There is a 3 in (76 mm) clearance from
the left and right sides of the unit to combustible and non-combustible surfaces.
Installaon
Installaon Manual